en passant

en pas·sant  (ä pä-sä)

adv.

1. In passing; by the way; incidentally.

2. Used in reference to a move in chess in which a pawn that has just completed an initial advance to its fourth rank is captured by an opponent pawn as if it had only moved to its third rank.

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[French : en, in + passant, passing.]

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en passant [on pass-on]

Adverb

in passing: references made en passant [French]

Thesaurus

Noun	1.	en passant - (chess) a chess pawn that is moved two squares can be captured by an opponent's pawn commanding the square that was passed capture - the removal of an opponent's piece from the chess board chess game, chess - a board game for two players who move their 16 pieces according to specific rules; the object is to checkmate the opponent's king
Adv.	1.	en passant - incidentally; in the course of doing something else; "he made this remark in passing" in passing